Variable-speed-transmission device



A. CHAPUYAND L. F. MEUNIER.

,VARIABLE SPEEDIRANS MISSION DEVICE. APPLICATION FILED 05c. 12, I918- 1 ,426,358, Patented Allg. 22, 1922.

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ATTY- A. CHAPUY AND L. F. MEUNIER. VARIABLE SPEED TRANSMISSION DEVICE.

' APPLICATION FILED DEC. .12, I918- 1,426,358

Patented Aug. 22; 1922.

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za z/zg A. C'HAPUY AND L. F. MEUNIER. VARIABLE SPEED TRANSMISSION Dl IVICE.

. APPLICATION FILED mzc. 12, I918. 1,426,358.

Patented Aug. 22, 1922.

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A. CHAPUY AND L. F. MEUNIER.

VARIABLE SPEED TRANSMISSION DEVICE.

v APPLICATION FILED DEC. I2. 19!!!- 1,426,358.

Patented Aug. 22, 1922.

8 SHEETS-SHEET 4.

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VARIABLE SPEED TRANSMISSION DEVICE-- APPLICAYION m zn 05c. I2, 1938.

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19m v. 47% m m A. CHAPUY AND L. F. MEUNIER.

VARIABLE SPEED TRANSMISSION DEVICE. APPLICATION FILED 056.12, i918- 1 ,426358, Patented Aug. 22, 1922.

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A. CHAPUY' AND L F. MEUNIERL VARIABLE SPEED TRANSMISSION DEVICE.

2 APPLICATION FILED DEC- IZ. I916- 2 1,42 53, PatentedAu'g. 22, 1922.

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' mounted coaxiallywith the driven shaft and in operative connectlon with a'rotary drum un ran; stares 'anro'nvn cnnruralvn'nnorr rnnncorsflilrnomnn, or er;r rrnltiin,' rnnnon v VARIABLE-srr nnJriaansivnssro v*nnvIcae. l v

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T 0 all whom it may concern Be it known that we An'romn ICH PUY and LEON.FRANGOIS Mnurnnn; citizens of the. Re ublic of France, residing at, respectively, 85 ue Marengoa St. Etienne, Loire, and t Rue Girodet a St. Etienne, Loire, in the Republic of v r I useful Improvements in Variable-Speed- Transmission Devices, of which the follow-i ing is a specification.

This invention relates to a power mitting mechanism of the variable speed type, in which the rotarymovement of the driving shaft is transmitted to the'driven shaft through the medium of Game or cranks mounted on the driving shaft and actuating one or more oscillating slotted llIlkS Journalled. on fixed trunn ons. Said slot-ted links are connected by connecting rods, tojan oscillating crown or intermediate member or" similar intermediate member keyedjon said shaft. Said operative connection is ef- 'fected by means of clutch members compr1sing rollers or wedge like members and cooperating surfaces formed on one of the sa d intermediate members or on annular plate. interposed between said ntermediate mem-' bers. A controlling device comprising" a screw and nut arrangement or alever and ratio may be 'varied as desired. shifting the clutch members to another operative position, the direction of the movement transmitted to the driven shaft. may be reversed, the driving shaft rotating still in the same direction. t

In the accompanyingdrawings,

Fig. 1 is a vertical section ofa mechanism in whichthe driving andfreceiving shafts are set at rightangles, the receiving shaft turning in one direction only,

3 Fig. 2 is a sectional'elevation of a mecha- 'nism in which the receiving shaft is reversi- "ble, that is-to 553 132111 turn in one or. thefopposlte dlrection. The sectional plan 1s shown on two sheets forfithe sake of convenience and comprises the two Figures 3 and 3 which shouldbejoined along line Fig. tshows a detail 'ofthe link gear in case of perpendicular"driving and receiving shafts, the latter being reversible; 1

Figs. 5 and 6 show another tem t driv- "mg gear.

France, have invented new and transconsidered, the driving gear consists .essea, tially I of a driving. shaft, 1 imparting an (oscillating or rocking motion to ithe'linlzsfi Fig; 7 is ainodified' arrangement ofthe same.

er v .9 is a corresponding'axial section of thesame. i

111 these indicate corresponding parts;

Specification of Lettersi'Patent. Patnted tug, 22,1922, I Application filed December 1 2, 191 Serial in; 256,405. i i i Fig. part side elevation of, a different type of clutch members v Fig. Sshows another type -of clutch I i.

. drawings like letters of reference Whichever may-be theapplicationto be which setthe receivingjshaft 3; in motion Each link is formedo'f two sides integral one with the other and each provided v with'a l housing forming path for a sliding'blocl'cjj jointed to the auxiliary ro'd'j16 servingto v The auxiliary rods 16 arefeach provided at: one end with a slot 17 throughwhicli extends a'small connecting rod 18 surrounding may be shifted in the cor-responding linklQ,

thus allowing through a displacement from position 19 to positiOh'ZO'th'e receivingshaft to pass progressively from a complete (stop page to half the speed of the driving 1 The auxiliary rods 16v impart a rotar'y'motion to the receiving shaft bymeans of the following de iceQCOaXiall-y withthe said actuate indirectly the receiving shaft. aThe "radius of the circular arc of each path has a lengthequal" tothat of the auxiliary rod. I a so er which"the slidiirg block l15'. fthe rod 16 shaft 3 islmounted an oscillating 'crown or intermediate member '30 to which the con necting rods 16, are respectively; connected.

Each crown 30 hasa'circular bore andirotates upon a rotary intermediate member ori'core 31.keyed upon the receiving shaft [andprovided with housings 32 having eac one-way. clutch therewith."

I a single, inclined roller re cessfior gradient In.- these housingsare arranged ribbed orfluted v rollers 35, thecrown pieces 30. aswell'as the 1 core gradients'b eing grooved tocorr'espond a exactlywith the'roller flutes. Springs 36aet ,to force the rollers 351'into engagementbe tween the members 30 and '31 so as toformja when the crown so is 0 cillated" time, connecting rod 16 in; the reversed direction. (arrow 38) the rollers'are forced back in instantaneous wedging I thus avoiding skidd ng.

their recesses in opposition to the springs 36 and the shaft 3 is not actuated. It will be thus seen that when the rods 16 act as pulling members the receiving shaft is rotated in the direction indicated by the arrow 37, but when they act as pushing members, the crown pieces only turn in the direction indicatedby the arrow 38 on their return to the position of engagement wit-h the rollers. The successive to and fro motion of the crown pieces will thus impart a rotation to the receiving shaft.

To impart a reversible motion to the receiving shaft, the housings 32 are provided with two gradients 33 and 34 (Figs. 2 and 3) and one or the other series of gradients is brought into play according to the direction of motion required. For this purpose two discs 39 are used for each driving part and are mounted upon the core wherein are held the ends of the roller 35, their object being to shift these rollers to the left or right hand side of the position they occupy in Fig. 2. The discs 39 are connected to the corresponding core 31 by springs 40 held under compression against the core by pistons 41. A sloping trigger l2 movable on the receiver shaft allows these discs 39 to be shifted in the direction indicated by the arrow 37 or by the arrow 38. By stretching the springs 40 by means of the said trigger a tangential action is exerted on the rollers 35 in one direction or in theother so that for each po sition of the said trigger the rollers can only move between the points a and .7) with a tangential action of the springs in the direction indicated by the arrow 37 and that for another position these rollers can only move between the pointsc and d with a tangential action of the springsin the direction indicated by the arrow 38.

The biting action of the crown pieces 30 is very energetic on account of the shape of the roller ribs or flutes which produce an or locking action Dead points are avoided by combining the link actuating device so that each crown piece is constantly engaged while the neighbouring one is free.

In gears for reversible motion such as above described, the sectional shape of the gradients of the trigger is not the same in all cases but is so calculated as to change the direction of motion, the driving parts at work being successively thrown out of gear, and successively put into gear again for working in a reverse direction. In case of heavy duty mechanisms the guide blocks 15 containing the axle pins 15 of the connecting rods 16 are preferably shifted along the slotted links by means of oneor two shafts 24 controlled by means'of 'a .le-

ver 28 (Figs. 1 and Said shafts actuate the blocks 15 by means of levers 25, chains 26 guided upon rollers 29 and small con-' in the arrangement shown in Fig. 1, the

shaft 1 is provided with a cam drum .9

formed with two roller paths 10 in each of I which rolls a roller 11 carried by an arm 12 actuating a link 2. The two roller paths 10 are symmetrically arranged with respect to transversal plane at right angles to the axis of the in the construction shown in Figs. 2, 3 and 3, the slotted links 2 are actuated by means of a'crank shaft with three cranks arranged at 120 operating three connecting rods 13.

il hen the driving and receiving shafts are at right angles to each other and the receiving shaft is reversible, a crank shaft with two or even three cranks is used as shown in Fig. a and drives the links 2 by connecting rods 14, provided with universal joints at their ends.

l l ith reference to Figs. 5 and 6, it will be seen that the discs 4 may have roller paths 5 constructed to impart 2, 3, 4t n oscillations to the links 2 at each turn of the driving shaft, whence arises the possibility of obtaining a greater speed capable of exceeding even that of the shaft 1.

Each of the links 2 is formed of two side members and is connected to the forked end of one of the connecting rods 16. By using such connecting rods having a forked end it will however be possible to form the links 2 of single member.

\ Each link 2 is'provided at its lower part with an opening 44 through which the pivot 45 of the connecting rod 16 may be inserted.

into position. Said pivot is provided with flattened parts in contact with the link, whereby the guideflblock 15 may be dispensed with. It may be remarked that with a very long rod 16 the slot in the link 2 may be made straight instead of curved (Fig.

Vvith reference to Figs. 5, 6, 7 8 and 9, the core 31 is entirely circular. In Figs. 5 and 6 the crown piece 30 is provided with gradients 33, 34 for reversing cases. The rollers 35 are entirely smooth or convex in the middle and have their journalsheld by the discs 39, but the connecting rod 16 engages these discs. The trigger 42 above mentioned is used toshift the crown piece 30 in such;

a manner as in operative position to present either its gradients 33 or 3% to impart a forward or a backward motion.

For very small powers, the rollers 35have the shape shown in Fig.7." They are inserted at their outer part in the crown 30 and the trunnions provided at their ends are still carried by the discs 39. Said trunnions are eccentric relatively to the circular outer part of the rollers so that by actuating the trigger 42 the apicesve or f of each roller are brought into contact with the core 31 whereby the driven shaft is caused to turn either forward or backward.

For driving parts which need not be reversible and when a brake is required on crown or drum said rod 45 extending through a similar lug 48 on said drum. A spring 46 placed between-the cross piece 43 and the rollers are held in contact with the core 31. Having now described our invention,

\ point, means with only one rounded apex'as lug 48 tends to force the drum 30 in the direction of the arrow whereby the what we claim as new and desire to secure by Letters Patent is:

A power prising in combination a driving shaft, an oscillating slotted link pivoted at a fixed for operatively connecting the driving shaft to the slotted link, a driven shaft, an intermediate rotary'member keyed transmitting mechanism comon, said driven shaft, an intermediate 0s cillating member arranged coaxially on said rotary ntermediate member, clutch memhers for operatively connecting the intermediate members to each other, a connecting rod pivotally connected at onetend to the oscillating intermediate member, the 0pposite end of said connecting rod being piv-' oted in the slotted link, a guide, a chain movable in said guide and having one end connected to said opposite end of the connecting rod and means for operating said chain.

In testimony whereof we have signed our names to this specification. ANTOINE CHAPUY.

LEON FRANCOIS MEUNIER. s.] 

